U.S. astronaut Shannon Lucid launched to Mir aboard STS-76 to set an American
long-duration spaceflight record of 188 days. Lucid returned to Earth on STS-79,
which brought up Lucid's replacement astronaut, John Blaha.

U.S. astronaut Andy Thomas launched to Mir aboard STS-89, to replace David
Wolf. Thomas' stay on Mir was the seventh and last of the Shuttle-Mir Program.
He returned to earth with shuttle mission STS-91, after 140 days in orbit.